Trying to recover an old build

Member

So, a very long time ago I had a very large build on the 500x500 plots. It was a very large red dragon, made entirely by hand without the use of world edit. It took me a few long months, and I still plan on finishing it. However, after the server did its change and plots got reset, I lost mine. I believe I recall getting it back, only to find that it's missing once more. This build took me a very long time, and it still isn't finished. Months, in fact. I've tried asking in game for help, only to be ignored or brushed off to the side, so I decided to head to the forums for help. When I originally got my plot back, I heard that it was somewhere in the "storage".

I'd greatly appreciate if I could get this plot back.
My username is Unwillingly
Discord is Unwilling#9099.